package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: hp
 * Date: 2024-03-12
 * Time: 22:06
 */
public class DelOperation implements IOperation{
    public void work(BookList bookList) {
        System.out.println("...删除图书...");
        System.out.print("请输入你要删除的图书名：");
        Scanner scanner = new Scanner(System.in);
        String bookName = scanner.nextLine();
        int currentSize = bookList.getUseSize();
        int i = 0;
        int pos = -1;
        for(; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if(bookName.equals(book.getName())) {
                pos = i;
                break;
            }
        }
        if(i >= currentSize) {
            System.out.println("不存在你要删除的书");
            return;
        }
        for(int j = pos; j < currentSize - 1; j++) {
            Book book = bookList.getBook(j + 1);
            bookList.setBook(j,book);
        }
        bookList.setUseSize(currentSize - 1);
        bookList.setBook(currentSize - 1,null);
        System.out.println("删除成功！");
    }
}
